Utils

Decode QR Code

Decodes a base64-encoded jpeg to a UTF-8 string. POST only.

Request:

• requestType is decodeQRCode
• qrCodeBase64 is a base64-encoded jpeg string to be decoded

Response

• qrCodeData (S) is a UTF-8 string containing the decoded data from the base64 string
• requestProcessingTime (N) is the API request processing time (in millisec)

Decode QR Code Example

Request

Test request

ttp://localhost:7876/nxt?
  requestType=decodeQRCode&
  qrCodeBase64=/9j/4AAQSkZJRgABAgAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRo...

Response

{
    "qrCodeData": "NXT-7A48-47JL-T7LD-D5FS3",
    "requestProcessingTime": 15
}

Detect Mime Type

Gets the mime type of uploaded file or data.

Request:

• requestType is detectMimeType
• data is the data (optional)
• file is the pathname of a data file to upload (optional if data provided)
• filename is a filename to associate with data (optional if file uploaded in which case the uploaded filename is always used)
• isText is false if data is a hex string (optional)

Response

• type (S) is the mime type
• requestProcessingTime (N) is the API request processing time (in millisec)

Detect Mime Type Example

Request

Test request

http://localhost:7876/nxt?
  requestType=detectMimeType&
  data=/9j/4AAQSkZJRgABAgAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRo...&
  isText=false

Response

{
"requestProcessingTime": 348,
"type": "image/png"
}

Encode QR Code

Encodes a UTF-8 string to a base64-encoded jpeg. POST only.

Request:

• requestType is encodeQRCode
• qrCodeData is a UTF-8 text string to be encoded
• width is the width of the output image (optional)
• height is the height of the output image (optional)

Response

• qrCodeBase64 (S) is a base64 string encoding a jpeg image of the QR code
• requestProcessingTime (N) is the API request processing time (in millisec)

Encode QR Code Example

Request

Test request

http://localhost:7876/nxt?
  requestType=encodeQRCode&
  qrCodeData=NXT-7A48-47JL-T7LD-D5FS3&
  width=100&
  height=100

Response

{
    "qrCodeBase64": "/9j/4AAQSkZJRgABAgAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UH...",
    "requestProcessingTime": 15
}

Full Hash To Id

Converts a full hash to an ID.

Request:

• requestType is fullHashToId
• fullHash is the full hash 64-digit (32-byte) hex string

Response:

• stringId (S) is the ID corresponding to the hash, in the form of an decimal string
• longId (S) is the signed long integer (8-bytes) representation of the ID used internally, returned as a string
• requestProcessingTime (N) is the API request processing time (in millisec)

Full Hash To Id Example

Request

Test request

http://localhost:7876/nxt?
  requestType=fullHashToId&
  fullHash=c34af8f1509e3be79c4562e24125ff2a8f026871fdd1a0366ad315bf8fab76b9

Response

{
 "stringId": "16662085316881435331",
 "requestProcessingTime": 0,
 "longId": "-1784658756828116285"
}

Hash

Calculates the hash of a secret for use in phased transactions with voting model 5 (Vote By Secret).

Request:

• requestType is hash
• hashAlgorithm is the hash function used: 2 for SHA256, 3 for SHA3, 5 for SCRYPT, 6 for RIPEMD160, 25 for Keccack25 and 62 for SHA256 followed by RIPEMD160, according to Get Constants
• secret is a secret phrase in text form or hex string form
• secretIsText is true if secret is text, false if it is a hex string (optional)

Note: secret is converted from a hex string to a byte array, which is what the hash algorithm expects, unless secretIsText is true, in which case secret is first converted from text to a UTF-8 hex string as by Hex Convert.

Response:

• hash (S) is the hash of the secret, in the form of a hex string
• requestProcessingTime (N) is the API request processing time (in millisec)

Hash Example

Request

Test request

http://localhost:7876/nxt?
  requestType=hash&
  hashAlgorithm=2&
  secret=74657374

Response

{
 "requestProcessingTime": 1,
 "hash": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
}

Hex Convert

Converts a text string into a UTF-8 hex string and if the text input is already a hex string, also into text.

Request:

• requestType is hexConvert
• string is a text string, possibly a hex string

Response:

• binary (S) is the converted UTF-8 hex string
• text (S) is a text string converted from string if it is a valid UTF-8 hex string
• requestProcessingTime (N) is the API request processing time (in millisec)

Hex Convert Example

Request

Test request

http://localhost:7876/nxt?
  requestType=hexConvert&
  string=616263

Response

{
 "binary": "363136323633",
 "text": "abc",
 "requestProcessingTime": 1
}

Long Convert

Converts an ID to the signed long integer representation used internally.

Request:

• requestType is longConvert
• id is a numerical ID, in decimal form but equivalent to an 8-byte unsigned integer as produced by SHA-256 hashing

Response:

• stringId (S) is the numerical ID
• longId (S) is the signed long integer (8-bytes) representation of the ID used internally, returned as a string
• requestProcessingTime (N) is the API request processing time (in millisec)

Note: Java does not support unsigned integers, so any unsigned ID (such as a block ID) visible in the NRS client is represented internally as a signed integer.

Long Convert Example

Request

Test request

http://localhost:7876/nxt?
  requestType=longConvert&
  id=15323192282528158131

Response

{
 "stringId": "15323192282528158131",
 "requestProcessingTime": 0,
 "longId": "-3123551791181393485"
}

RS Convert

Get both the Reed-Solomon account address and the account number given an account ID.

Request:

• requestType is rsConvert
• account is an account ID (either RS address or number)

Response:

• accountRS (S) is the Reed-Solomon address of the account
• requestProcessingTime (N) is the API request processing time (in millisec)
• account (S) is the account number

RS Convert Example

Request

Test request

http://localhost:7876/nxt?
  requestType=rsConvert&
  account=NXT-L6FM-89WK-VK8P-FCRBB

Response

{
 "accountRS": "NXT-L6FM-89WK-VK8P-FCRBB",
 "requestProcessingTime": 1,
 "account": "15323192282528158131"
}